code: def set_cache_dir(path) -> None:
      """
      Sets the persistent compilation cache directory.
  
      After calling this, jit-compiled functions are saved to `path`, so they
      do not need be recompiled if the process is restarted or otherwise run again.
      This also tells Jax where to look for compiled functions before compiling.
      """
      config.config.update("jax_compilation_cache_dir", path)
  
imports: from __future__ import annotations
  import logging
  import threading
  import warnings
  import zlib
  import numpy
  from jax._src import cache_key
  from jax._src.compilation_cache_interface import CacheInterface
  from jax._src import config
  from jax._src import monitoring
  from jax._src.gfile_cache import GFileCache
  from jax._src.lib import xla_client
  from jax._src.lib.mlir import ir
label_desc: Use image node_id 3 for calling a global function with example usage: set_cache_dir(path) without return types